Push-Button Description; Reset; Current Threshold Setting - Eaton EAFR-110 User Manual

3.3 Push-button Description

The EAFR-110 contains one single push-button (SET) that
can be used for all operational functions of the relay. The
SET push-button is used to initialize the auto-configuration
of the system (see Section 3.3.1) and for resetting the indi-
cators and latched output relays.
3.3.1 Auto Configuration (System Setup)
When all current circuits, sensors, and binary lines have
been connected, an auto-configuration procedure must
be executed. The initialization sequence is performed by
pressing the SET button for two seconds, and the EAFR-
110 sensor LEDs and BI1/BI2 LEDs start blinking. The relay
scans these inputs to see if they are connected and, when
an input is detected, the corresponding LEDs are illumi-
nated to mark that a connection was found. The inputs
without a connection continue blinking during the remaining
three seconds. After five seconds, all LEDs are turned off.
During this system setup, the dipswitch settings are also
stored in non-volatile memory.
All sensor inputs will remain operational even when not
auto configured. The auto configuration is only used for
self-supervision purposes.
N otee: To redo auto configuration for a relay containing less
connections (binary inputs/outputs or sensors) than
in previous memorized set-up, a dip-switch (anyone)
must be moved back and forth prior to performing
auto-configuration. Timeout allowing new configura-
tion is one minute. Reconfiguration with more con-
nections is allowed without moving a dip-switch.

3.4 Reset

All LED indications and latched trip relays are reset by
pressing the SET button for one second. Otherwise, the
latched trip relays will remain activated until auxiliary power
is disconnected. All LED indications will remain active until
a reset is performed by the operator, even in the case of
disconnecting the auxiliary power supply (see Section 3.7:
Non-volatile Memory).
EAFR-110 Current and Arc Light Sensor Relay User Manual MN026007EN February 2016 www.eaton.com
3. Operation and Configuration

3.5 Current Threshold Setting

The EAFR-110 relay has four current measurement inputs
utilized for three-phase and earth current measurement.
Both phase current and earth current measurements are
utilized as the second trip criteria in an arc protection sys-
tem in order to avoid a trip caused by natural light sources.
Phase over-current threshold is typically set 50 % above the
highest load current (In). Earth fault over-current is very sen-
sitive. Set points are set using potentiometers (see Figure
4). An accurate setting is obtained by injecting the desired
set value using a relay test set to phase and earth current
inputs of the EAFR-110, simultaneously adjusting the poten-
tiometers until phase and earth current indication LEDs are
illuminated.
The setting range for the phase over-current stage is 0.5 to
6 xIn. The setting range for earth fault over-current stage is
0.05 to 2 xIn.
Figure 4. EAFR-110 Over-current Setting Potentiometers.
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